<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>登录页面</title>
    <link href="css/common.css" rel="stylesheet">
    <link href="css/login.css" rel="stylesheet">
</head>
<body>
<!-- 背景层 -->
<div class="cover"></div>
<!--导航栏-->
    <div class="nav">网页聊天</div>
<!--主窗口区-->
    <div class="login-container">
<!--        登录框-->
        <div class="login-dialog">
            <h3>登录</h3>
            <div class="row">
                <span>用户名</span>
                <input type="text" id="username">
            </div>
            <div class="row">
                <span>密码</span>
                <input type="password" id="password">
            </div>
            <div class="row">
                <button id="submit">登录</button>
            </div>
            <div class="row">
                <button id="registerSubmit">注册</button>
            </div>
        </div>
    </div>
    <script src="js/jquery.min.js"></script>
    <script>
        let submitButton = document.querySelector('#submit')
        let registerSubmit = document.querySelector('#registerSubmit')
        registerSubmit.onclick = function () {
            location.assign('register.html')
        }
        submitButton.onclick = function () {
            // 获取输入框中的内容
            let username = document.querySelector('#username').value;
            let password = document.querySelector('#password').value;
            if (username == '' || password == '') {
                alert("当前输入的用户名或密码为空！")
                return
            }

            //构造ajax请求
            $.ajax({
                url: 'user/login',
                type: 'post',
                data: {
                    username: username,
                    password: password
                },
                //处理服务器的响应
                success: function (ret) {
                    //此处的ret是一个user对象
                    //判断ret是否为空
                    if (ret && ret.userId > 0) {
                        alert("登录成功！")
                        location.assign('/client.html')
                    } else {
                        alert("登录失败，账号或密码错误！")
                    }
                }
            })
        }
    </script>
</body>
</html>